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科研机构
厦门大学 [3]
地理科学与资源研究所 [3]
长春光学精密机械与物... [1]
内容类型
SCI/SSCI论文 [3]
学位论文 [2]
会议论文 [1]
期刊论文 [1]
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2016 [1]
2011 [1]
2010 [3]
2007 [1]
2003 [1]
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Warm season heavy rainfall events over the Huaihe River Valley and their linkage with wintertime thermal condition of the tropical oceans
SCI/SSCI论文
2016
作者:
Li L. F.
;
Li, W. H.
;
Tang, Q. H.
;
Zhang, P. F.
;
Liu, Y. M.
收藏
  |  
浏览/下载:19/0
  |  
提交时间:2017/11/09
Heavy rainfall events
Seasonal climate prediction
Bayesian inference
on precipitation
Huaihe River Valley
Normal mixture model
Support
vector machine
asian summer monsoon
surface-temperature
western pacific
climate
variability
daily precipitation
eastern china
late 1970s
impacts
teleconnection
circulation
1970年代以来菲华社团的新变化
学位论文
2011, 2011
陈改利
收藏
  |  
浏览/下载:1/0
  |  
提交时间:2016/02/14
1970年代以来
菲华社团
新变化
since the 1970s
Filipino-Chinese Associations
new changes
70年代中美苏战略大三角述评
期刊论文
2010
肖庆
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  |  
浏览/下载:2/0
  |  
提交时间:2016/05/17
战略三角理论
70年代
中美苏战略三角
四个阶段
局限
Strategic Triangle Theory
1970s
strategic triangle of China
America
Soviet
4 stages
limitations
Determining factors in potential evapotranspiration changes over China in the period 1971-2008
SCI/SSCI论文
2010
Yin Y. H.
;
Wu S. H.
;
Dai E. F.
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  |  
浏览/下载:31/0
  |  
提交时间:2012/06/08
potential evapotranspiration
climate change
sensitivity analysis
determining factor
radiation
wind speed
pan evaporation trends
penman-monteith
sensitivity-analysis
united-states
radiation
cloudiness
variables
1970s
model
india
Trend in pan evaporation and its attribution over the past 50 years in China
SCI/SSCI论文
2010
Liu M.
;
Shen Y. J.
;
Zeng Y.
;
Liu C. M.
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  |  
浏览/下载:12/0
  |  
提交时间:2012/06/08
pan evaporation
Mann-Kendall test
diurnal temperature range
wind
speed
compete correlation
China
1970s
Application of CMOS APS star tracker with large FOV in attitude and angular velocity determination (EI CONFERENCE)
会议论文
Advanced Sensor Systems and Applications III, November 12, 2007 - November 14, 2007, Beijing, China
Lu D.
;
Guang J.
;
Shaoju W.
;
Tao C.
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  |  
浏览/下载:21/0
  |  
提交时间:2013/03/25
The paper deals with the spacecraft attitude determination problem using a new kind of star tracker with large FOV based on CMOS APS. Star tracker has been developed since 1970s and proved to be the most accurate sensor ever used in the spacecraft attitude determination systems. But the traditional CCD star tracker also has some disadvantages
such as small FOV
high power consumption
low sample rate and low working angular rate limit which prevent the use of CCD star tracker in attitude large angle maneuvering process. The new kind of star tracker based on CMOS APS has no such disadvantages and is more applicable on modern low-cost agile small satellites. Its higher sample rate and working angular rate limit over traditional CCD star tracker make it more adapt for spacecraft angular velocity determination. Because of the large FOV of the star tracker
the mathematical model of traditional CCD star tracker with a small FOV is not appropriate. So a new mathematical model was quoted to fit the star tracker with a large FOV. An alternative adaptive algorithm was also introduced in the paper. It can help the EKF algorithm work lacking of accurate covariance of the observation noise. An optimal estimation algorithm was used to estimate the angular velocity directly from the star tracker measurements. Mathematic simulation results indicate the CMOS APS star tracker can give accurate attitude information and estimated angular rate. The method can be used as the chief attitude determination system design of low-cost satellite without gyros
or be used as a backup strategy in the event of gyro failures to enhance the reliability of the attitude determination system.
20世纪七八十年代美国州政府经济职能及政策的转变
学位论文
2003, 2003
申晓英
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  |  
浏览/下载:1/0
  |  
提交时间:2016/02/14
美国
州政府
七八十年代
经济职能
United States
State government
1970s and 1980s
Economic Role
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